Improvement in sewing-machines



G. S. CUSHMAN. Sewing-Machine.

N0. lfi l gg F 2 She ets--Sheet1.

Patented June 15, I875.

Mn revafor %"7 WWW? THE GRAPHIC CO.PH 0T0 -L TH.39 8: 4-1 PARK PLACE, NY.

2 Sheets--Sheet2. C. S. CUSHMAN.

Sewing-Machine. N0.164,529 PatentedJune15,1875.

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FIGJ'Z FIGB W WW THE GRAPHIC CD.PNOTO-LITM.39&4I PARK PLAGE,N.Y.

UNITED STATES PATENT QFFIGE.

CYRUS S. OUSEMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO NESBITT D. STOOPS, OF SAME PLACE.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 164,529, dated J nne 15, 1875; application filed April 14, 1875.

To all whom it may concern Be it known that I, CYRUS S. CUSHMAN, of the city and county of Philadelphia, in the State of Pennsylvania, have invented an Improvement in Sewing-Machines, of which the following is a specification:

My invention consists in the first place of a geared connection of a circumferential cam with the drivingshaft, as hereinafter described, for giving an intermittent rotary motion to the pattern-cam of a sewing-machine, substantially as set forth.

In the accompanying drawings, Figure l is an end elevation of the bed-plate A and feeding apparatus connected with its lower side. Fig. 2 is a bottom view of the feeding apparatus in connection with the bed-plate A. Fig. 3, Sheet No. 2, is a vertical section taken at the line 00 a; of Fig. 2. Fig. 4 is a rear View of the detachable frame E, and parts attached removed from the machine. Figs. 5 and 6 are a side and edge views, respectively, of the adjustable plate L. Figs. 7 and 8 are a side and. edge views, respectively, of the finger a of the feed-bar.

Like letters of reference in all the figures indicate the same parts.

A is the bed-plate of my improved machine. B is the driving-shaft, which has on its front end the double feed-cam G, for giving the up and down and forward movements to the feed-bar D, the cams bearing against the shoe a and finger a. The bar is hung at one end, by means of the pin 1), to the detachable frame E, the pin passing through the slot 0, whereby it is capable of its forward and backward movements. The pin 1) in the other end of the bar is free to move up and down in the opening 0 of the said frame, for giving the up-and-down movement to the feedsurface F.

The backward movement of the feed-bar is given by means of the pull-spring G, connected at one end to the projection 01 of the frame E, and at its other end to the feed-bar. The backward throw of the feed-bar D, whereby the length of the stitches is regulated, is adjusted by means of the lever H on the fulcrum-pin e, in combination with the cam-lever I hung on the pin f. The feed-surface F is separate from the feed-bar, and has a sliding lateral movement in the slot 9 of the bar, for producing ornamental stitching. For giving this movement there is a wheel, J, a portion of the periphery of which is cut away to form the tooth t' that engages with the teeth jof the plate-wheel K. It has also a tooth, t", in a different plane from the tooth t', which engages with the teeth j of the plate-wheel K the teeth of each wheel K and. K being formed by curves k, of somewhat larger radius than the radius of the wheel J, to give smoothness to the working of the teeth. The teeth j of the wheel K are arranged circumferentially between the teeth j of the wheel K, whereby the teeth of the two wheels are acted upon alternately, to insure an easy movement of the Wheels, and free from jar.

The wheels K and K are situated upon the stud l, which projects from the plate L, which has a hole, m, at one end, as seen in Fig. 5, that fits on the stud I that projects from the frame E, and is adjustable, so as to regulate the connection of the teeth of the wheels K and K with the teeth 11 and i, by means of the slot n that is concentric with said hole m, and the screw-pin 0, which confines it to the outer end of the stud l that projects from the arm 19 of the frame E. On the stud I there is also a spur-wheel, K which gears into the teeth of the wheel K which is fast to the hub q on the inner end of the cylinder M.

By the combination and arrangement of the series of gear-wheels above described, an intermittent rotary movement is given to the said cylinder M, which has a circumferential cam-groove, r, that receives the inner end of the pin .9 of the sleeve N, whereby a reciprocating movement is given to said sleeve, for the purpose of giving a reciprocating lateral movement to the feed-surface, there being an arm, t, on the outer end of the stud Z of said surface, which connects with the slot u of the sleeve.

I claim as my invention- 1. The combination of the wheel J, having teeth t' and c", teeth-wheels K and K spur- Wheels K and K and the cylinder M, having acircumferential cam-groove,,with the sleeve structed as described, for giving an intermit- N, having pins for giving a reciprocal lateral tent. rotary motion to the pattern-cam of a movement to the feed-surface F, for producsewing-machine, substantially as described.

ing ornamental stitching, substantially as set CYRUS S. OUSHMAN. forth. Witnesses:

2. The wheel J, having teeth '5 and i, in THOMAS J. BEWLEY,

combination with teeth-Wheels K and K ,co11- v STEPHEN USTICK. 

